In this small room, a huge furnace stood in the center of the room, and a red flame was already burning in the furnace.

Lin Yuxin smiled at Ling Yifeng and said, "Do you think that Bigu Pill is still easy to use?"

"Bigu Pill is okay, it can save me a lot of time to eat, but in terms of effectiveness, I think it seems to be better than a bottle of blood condensation!" Ling Yifeng was quite straightforward, and he didn't flatter at all.

Indeed, the most important thing about this kind of pill is practicality and necessity, the so-called practicality is to see how useful the function it can play at the critical moment, and necessity is whether it is really unique and must be?

For example, it can be used to stop bleeding and treat wounds when you are severely wounded, and you may be able to save a life at a critical moment! This is very practical, and when it comes to necessity, there may be other better healing drugs that can replace it, but the cost will definitely only far exceed it.

And this Bigu Pill, although it can make people not feel hungry all day long, but it is not too difficult to obtain such a thing as food, Ling Yifeng can also prepare a lot of dry food in the space ring in advance, besides, even if a person of his strength is hungry for a few meals, it is not a big problem! It can be seen that the necessity of Bigu Pill is not so necessary!

Although Lin Yuxin said that it could be regarded as a real first-grade elixir, in Ling Yifeng's opinion, it was a little too chicken!

"Hmph!" Lin Yuxin wrinkled her delicate little nose and snorted lightly, but she didn't refute it, obviously she also agreed with Ling Yifeng's point of view.

"So, if there is an elixir that can quickly restore the spiritual power you use, and can also recover a lot of physical strength, what do you think, how about this elixir?" Lin Yuxin suddenly smiled at Ling Yifeng.

"If there really is such an elixir, it is definitely a good thing that cannot be exchanged!" Ling Yifeng said in surprise.

The use of spiritual power is the source of their strength for a spiritual practitioner like theirs. The cultivation on weekdays is to incorporate the free spiritual power factors floating between heaven and earth into the dantian, and refine them into their own spiritual power, the more they cultivate, the more refined and powerful their spiritual power becomes.

However, the spiritual power in the body is limited, and once it is exhausted, it takes a lot of time to replenish it from the outside world, which is the same as the need to rest when the physical strength is exhausted. However, unlike physical strength, spiritual power can be obtained in other ways, for example, the inner pill of some demonic beasts, or a certain fruit containing a lot of spiritual power, and for example, the elixir in Lin Yuxin's mouth that can quickly restore spiritual power!

The practicability of this elixir can be imagined, when encountering an opponent who is on par with oneself and confronting it, when the spiritual power of both sides is gradually exhausted, at this time, if one party can quickly replenish the spiritual power, then the final result can be imagined!

"Uh-huh!" Lin Yuxin smiled and winked at him.

"Can you really teach me to refine such an elixir?" Ling Yifeng was pleasantly surprised.

"You might as well think back to the medicinal herbs I bought!" Lin Yuxin reminded.

Ling Yifeng's heart moved, and his eyes swept to the medicinal herbs arranged on the ground: Vitality Qi Flower, Qi Yuan Fruit, Snow Ginseng, Yang Coriander Flower...... These herbs seem to have a good effect of restoring aura!

"But don't get excited yet!" Lin Yuxin looked at Ling Yifeng, who was extremely excited, and poured a basin of cold water on his head: "This kind of elixir belongs to the second-grade high-level, and now you can't refine it at all!"

"But you don't have to be discouraged, I'll teach you to refine some first-grade pills first, and when you can control the flame, temperature, and spiritual power well, then try to refine these second-grade pills!"

Ling Yifeng was not discouraged by this, he had already mastered the control of the heat when he was refining the blood condensation powder day and night before, he could put eight kinds of medicinal materials into the furnace at the same time, and manipulate eight different temperatures for refining!

"Okay, I'll learn to refine a pill first!" Ling Yifeng smiled at Lin Yuxin.

Lin Yuxin expressed great satisfaction with Ling Yifeng's attitude, recognizing his own position and not being ambitious, which is something that a smart person should learn.

"Hmm......" Lin Yuxin held her chin and thought for a while: "I'll teach you to refine this Bigu Pill first, it belongs to a mid-level elixir, and it is suitable for you to use it to practice!"

"You see, I'll show you again, you can see the refining degree of various materials clearly, you must pay attention to the timing of their final fusion, once you don't seize the opportunity, the medicinal power in it will be lost!" Lin Yuxin stopped laughing and became serious.

Ling Yifeng also had a serious look on his face and nodded heavily.

After adjusting her breathing slightly, Lin Yuxin instantly raised the flames in the furnace, and a heat wave rushed out from several fire mouths, and the red flames reflected her little face red.

But she completely ignored the heat, reached out and grabbed a rattan and threw it into the hole in the canopy, and entered the flames, the branches on the side of the rattan were quickly burned into ashes, and the rattan itself was like an iron rod that did not care about the surrounding fire!

Ling Yifeng knew that this was a hundred-year-old Earth Emperor Vine, and its body was as hard as iron, and it was difficult to cut it even with an ordinary sword! But in this high-temperature fire, even if it was really pig iron, it could be slowly burned by it, not to mention that it was just a rattan!

Ling Yifeng clearly felt that this rattan gradually became soft, bent, and deformed in the flames, and was incinerated into a puddle of debris before it could last until it could reach a cup of tea. Lin Yuxin also quickly lowered the temperature in the furnace, and then, she directly threw the other seven or eight kinds of medicinal materials into the furnace in one go! These seven or eight kinds of medicinal materials were quickly refined into materials in various states, either crumbs or paste.

Lin Yuxin gradually frowned, and slowly gathered seven or eight materials towards the middle of the Ding Furnace, and at the same time, the temperature of the flame was constantly and rapidly changed, so that it remained at a balanced point.

Soon, several materials fused with each other, absorbed each other, and turned into a huge puddle of paste-like objects, Lin Yuxin did not stop, and continued to raise the temperature of the flame until all the materials were evenly mixed together. Immediately afterwards, Lin Yuxin's fingertips flicked slightly, and several spiritual powers shot into the furnace, evenly dividing the puddle of pale yellow paste into more than a dozen balls of slightly smaller paste.

After doing this step, Lin Yuxin breathed a sigh of relief, but she didn't stop, and continued to slowly heat up and roast the dozen or so small balls of paste, until they were roasted to remove excess water and gradually solidify into a solid small round ball.

With a gesture of reaching out, more than a dozen small pills flew out of the medicine mouth, and Lin Yuxin took out a vial and accurately caught them one by one!

"Okay, do you see clearly, do you need me to explain it to you in detail?" Lin Yuxin brought the vial to Ling Yifeng's nose, and a faint warm fragrance entered his nostrils.

Ling Yifeng gently sniffed the fragrance of this Bigu pill, there was still residual heat on the pill, but he was carefully thinking about Lin Yuxin's operation.

Suddenly, he grinned silently, this didn't seem to be very difficult, except for the first Earth Emperor Vine, which was more difficult to refine, the other medicinal herbs were still relatively easy to refine, and the temperature to which each medicinal herb was adapted was also very carefully noted down just now.

After quietly recalling the whole process, Ling Yifeng raised his head and looked at Lin Yuxin and said, "I'll try it!"

"This is a real first-grade pill, you don't have to be reluctant!" Lin Yuxin said, but still gave up her position.

Ling Yifeng cast a reassuring look at her, stretched out his hand and fed a spiritual power into the furnace, and in an instant, a fierce flame rose into the sky.

Lin Yuxin was also slightly surprised, this firepower seemed to be a little stronger than hers!

Reaching out and finding an Earth Emperor vine that was neither long nor short, Ling Yifeng threw it into the hole in the lid of the tripod, and under the wrapping of the flames, it slowly sank into the center of the tripod body.

Under the scorching heat of such a fierce flame, the rattan, which was as hard as iron, began to slowly melt.

After refining the entire rattan, it was much faster than Lin Yuxin!

But soon, the pale yellow debris was burned into a pile of ashes by the heat!

"Huh?" Ling Yifeng opened his eyes and frowned slightly, he didn't expect it to be like this.

"The Earth Emperor Vine is indeed very resistant to high temperatures, but the residue after burning is very easy to be destroyed by high temperatures, you didn't notice that I didn't raise the temperature too high, and it was already slowly lowering the temperature before it was about to be refined!

Stretched out his hand and scratched his head, Ling Yifeng was also a little embarrassed, he saw this, but he didn't expect it to be easy to heat up, but to lower the temperature is not just to reduce the temperature of the flame, although the temperature of the flame has been reduced, but its residual temperature is still there, it is this residual temperature that burns those debris!

Failure to refine medicine is a very common thing, and no one dares to say that it can be 100% able to refine medicine. After thinking about and summarizing for a short time, Ling Yifeng refined it again.

With the lesson of the last time, Ling Yifeng controlled the flame in time to lower the temperature of the rattan when it was about to be completely burned, but because he lowered it too early, it took longer to refine it.

For the next seven or eight kinds of medicinal materials, Ling Yifeng also followed Lin Yuxin's example and threw them all into the furnace. Lin Yuxin frowned slightly after seeing this, how could a beginner like Ling Yifeng be able to control so many medicinal materials at the same time?

However, what surprised her next, Ling Yifeng was really able to master the heat of seven or eight kinds of medicinal materials at the same time, no wonder he was able to practice so many blood condensation powders in just half a month last time, it turned out to be like this!

The next steps were difficult for Ling Yifeng, and soon, more than a dozen fresh and hot Bigu pills were also baked!

Nodding, Lin Yuxin suppressed the shock in her heart, and said lightly: "You continue to practice, and after refining all these hundred medicinal materials, I will teach you to refine the second-grade pill that can restore spiritual power!"

I really didn't expect that Ling Yifeng would be able to successfully refine the first-grade pill Bigu Pill for the second time he refined the pill, and perhaps, he could really refine the second-grade pill next time! Oh my God, what kind of monster I unearthed!